16Hit1600
Expression of IdeasEasy–MediumDescribing how something works

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - A bicycle's gears change how far the bike travels for each turn of the pedals. - In a low gear, one pedal turn moves the bike a short distance, making hills easier. - In a high gear, one pedal turn moves the bike a long distance, good for speed on flat roads. - Most bikes have between 7 and 27 gears.

The student wants to explain the difference between low and high gears. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. In a low gear, each pedal turn moves the bike only a short distance, which makes hills easier; in a high gear, each turn moves it a long way, which suits speed on the flat.Correct
  2. B. Bikes have between 7 and 27 gears.
  3. C. Gears change how far the bike travels per pedal turn.
  4. D. Low gears are for hills.

Answer: A. In a low gear, each pedal turn moves the bike only a short distance, which makes hills easier; in a high gear, each turn moves it a long way, which suits speed on the flat.

Both gears, what each does, and when each helps.

Why the other answers are wrong

B. Bikes have between 7 and 27 gears.
The count, not the difference.
C. Gears change how far the bike travels per pedal turn.
The general principle without the low/high contrast.
D. Low gears are for hills.
Only half the contrast.

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